First, don't pay anything until paternity is established. If the child is still a minor, you will most likely have to pay current (ongoing) support. However, based on the facts you describe, you have a good argument that you should not have to pay retroactive support.
Yes, if it can be proven through a paternity test that you are the father.
Yes, if it can be proven through a paternity test that you are the father.
Yes, if it can be proven through a paternity test that you are the father.
Yes, if it can be proven through a paternity test that you are the father.
Yes, if it can be proven through a paternity test that you are the father.
If the father is unknown, you can't file for support.
no
Under UK Child Support law, the CSA would order the test and if he is proved to be the father he would pay for the test after the event.
The father can file for this change.
yes see link
No, and of the two, being denied a father is far most costly to the child and society in general as 85% of crime is committed by those who grew of fatherless.
Not really. It depends on the situation.
No. However, if the alleged father has signed the birth certificate, he is acknowledging that the child is his. There are steps to take in order to be taken off of the birth certificate and relieved of the obligation of child support, including a paternity test and an amendment to the birth certificate.
Yes and he still have to pay whether he signs the birth certificate or not.
Is he being denied access?
Yes, but paternity must be established first.
Unlikely. Your husband is the legal father of the child.